Which is better for gaming?

The Samsung. Its 165 Hz refresh rate and four HDMI ports beat the LG's 120 Hz and three ports. The LG's older webOS also limits game-mode features.

Which handles a bright room better?

The Samsung. Its Glare Free coating cuts reflections, while the LG's glossy curved panel shows them, especially from the sides.

Does the LG support Dolby Vision?

Yes. The LG supports HDR10 and Dolby Vision. The Samsung supports HDR10+ instead, so the two split on HDR formats.

Is the curved LG screen a problem?

It narrows the sweet spot. Viewers off to the side see more reflection and color shift. The flat Samsung is easier to place in a wide seating area.

Is the Samsung worth stepping up to?

For most buyers, yes. You get a brighter panel, faster refresh, an extra HDMI port, and a newer smart platform. Step down to the LG only for 3D or a curved screen.

Both use OLED panels with similar lifespans. The Samsung's newer processor and platform should stay supported with app updates longer than the LG's webOS 3.0.

Samsung 65-inch OLED 4K Smart TV vs LG 65" 4K OLED Smart TV

The Samsung is the better TV for most people. It has a brighter, glare-resistant OLED panel, a 165 Hz refresh rate for gaming, four HDMI ports, and a newer AI processor. The LG is an older curved OLED with a 120 Hz panel, three HDMI ports, and webOS 3.0, and its 3D feature dates it. Owners rate the Samsung higher, and reviewers praise its glare handling. Choose the LG only if you want a curved screen or 3D playback.

Choose the Samsung if you want the sharper, brighter picture, smoother gaming, and more HDMI inputs.
Choose the LG if you specifically want a curved OLED screen or built-in 3D.

Prices

Samsung 65-inch OLED 4K Smart TV: $1,358.59 at Buy IT Solutions Inc. (checked today)
LG 65" 4K OLED Smart TV: $1,399.99 at Walmart (checked today)
Difference: the Samsung 65-inch OLED 4K Smart TV is $41.40 cheaper than the LG 65" 4K OLED Smart TV today